Perhaps you should try some spelling variations:
nang tai » hang tai, tang tai, sang tai
hieu van » hieu va, thien van, lieu va
hanh hai » thanh hai, nhanh hai, hang hai
tai hoi » tai khoi, dai hoi, tai hai
hieu ve » hieu va
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
su cac » tu cac, su cao, su can
luc va » tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky nang tai hoi. ((hieu ve) or (hieu van)) coc ((luc va) OR (duc va)) hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang tai hoi. ((hieu ve) OR (hieu van)) coc ((luc va) OR (duc va)) hanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky nang tai hoi. ((hieu ve) or (hieu van)) coc ((luc va) OR (duc va)) hanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su cac ky nang tai hoi. ((hieu ve) or (hieu van)) coc ((luc va) OR (duc va)) hanh hai cua tre*.